Bracket component for forming a staircase



FIG. 1 is a front perspective view from above and one side of a bracket component for forming a staircase showing my new design;

FIG. 2 is a side elevation of the component of FIG. 1; and

FIG. 3 is a rear elevation of component of FIG. 1. 

The ornamental design for a bracket component for forming a staircase, as shown. 